volcan-bouclier

CONT: [Les volcans en boucliers] diffèrent des nappes de basalte en ce qu'ils ont un profil nettement conique [...] et de tous les autres volcans par leur plus grande taille. Leur distribution le long d'une ligne suggère leur liaison possible avec une fracture, mais leurs contours sont ceux de boucles formées autour de centres uniques, ou de courtes fissures.
CONT: Le cône de lave résulte de la superposition de couches de laves, issues du cratère principal, ou de fissures latérales.

CONT: Volcanoes that have a long history of eruptions of the quiet lava type usually have gently slopes. They are called shield volcanoes or lava domes and the lava is usually of basaltic composition and low viscosity.
OBS: [Shield volcanoes] differ from the floods in being recognizably peaked ... and from all other known volcanoes in being larger. Their distribution is linear, suggesting fracture control, but their contours form closed loops about individual centers or short fissures.